Fan attachment for smoke-stacks.



0. K. CHATTE -RT0N. FAN ATTACHMENT FOR SMOKE STAOKS.

APPLICATION FILED JUNE 29, 1912.

Patented Sept. 9, 1913.

2 w a M QMAQ I s'rA'rEs PATENT curios.

c'HnrtLEs K. 'oHAr'rEnToNgoF Lone PRAIRIE, MrNnEso'rA, assr'en'on or ONE-FOURTH To PERRY KNA-PIT, or LONG PRAIRIE, Minnesota.

FAN" ATTACHMENT FOR sMoKE sTACKs.

Specification of Letters Patent.

Patented Sept. 9, 1913.

Application filed June 29,1912. serial no. rowel.

To all whom, it may concern:

Be it known that 1, CHARLES K. CHATTER- TON, citizen of the United States, residing at Long Prairie, in the county of Todd and State of Minnesota, have invented certain new and useful Improvements in Fan Attachmentsfor Smoke-Stacks, of which the following is a specification.

My invention relates to new and useful improvements in [motors and more particularly to that class of motors embodying an elongated shaft having radially directed propeller blades adapted to be acted upon by a passing current of air, smoke, steam, water or like fluid to rotate the shaft and thereby furnish power for the driving of any preferred type of machinery.

More particularl the object of my invention is to provide a novel means for mounting a motor of the above described type in the stack or flue of a furnace or other heating device in such a manner that it is driven by the products of combustion by the fire i passing through the stack on their way to the air.

A still further object of myinvention is to provide a novel means of mounting the pro peller blades upon the propeller shaft and also a peculiar and effective manner of arranging the blades upon the shaft. 7

With these and other objects in view, my invention will be more fully described, illustrated in the accompanying drawing, and then specifically pointed out in the claims which are attached to and form a part of this application. v e

In the drawing: Figure 1 is a central longitudinal section of a conventional form of smokestack, showing my motor applied thereto; Fig. 2 is a transverse section onthe line 22 of Fig. 1; Fig. 3 is a perspective view of one of the blade holders by means of which the propeller blades are mounted upon the shaft.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawing by the spiders 11 and 12 in which is journaled the propeller shaft 13 carrying a plurality of propeller blades 14.

It will of course be understood that a motor of this type may be positioned within a stack without the intervention of the faun or that it may be employed equally as well in a horizontally extending flue leading to the stack, or in both, the propeller V shaft in this case being formed in two s'ect ions operatively connected to each other either bye gimhal jointor by beveled ears. It ill also b apparent that the ro eller shaft and its blades may be employed either with or without the frame as a, water motor, being either 3x 1101131 or partially submerged in a swiftly flowing str amer rivet I do not therefore wish to limit myself to the,

specific use of a ropenerin a smoke-stack vertical or otherwise.

Referring more specifically'to the drawing, which shows the motor mounted in a conventional form of smol'ze-stack 15 into i which leads the flue ltS, itwill be seen that the lower spider is provided centrally with a socket 17 in the base of which is positioned a wear plate 18 preferably ofhighly tempered steel or other wear resistin metal,

and across the upper end of which is bolted or otherwise secured a plate 19 provided with a centrally formed bore, the bore and plate 18 co-actinoto form abearing for one end of the prope ler shaft. Thespider 12 is centrally provided with a cylindrical socket 20 forming a bearing for the other end of the shaft.

The propeller shaft may be formed of wood or metal as preferred, the material of which it is made depending upon the use to which the motor is to be put and the degree of heat or strain which it must withstand.

lf formed of wood its ends are preferably inclosed in metallic caps 21 and pins 22 ex tend centrally from the ends of the shaft through the caps and'through the bores of the plate 19 and of the; spider 20, the lower end of that pin passing through the plate 19 bearing upon the upper face of the plate 100 18 to produce practically frictionless beae. ing. A suitable washer 23 may be inter pos'ed between the upper end of the propeller shaft and the spider 20 to take up wear If the shaft is formed 105 between the same. of metal, its ends are preferably somewhat reduced to engage in the bearings inthe Same manner as the pins.

An opening 24 is formed through one side of the lower portion of the stack for the 110 angles to each other.

passage of a belt or chain 25 for transmitting power from the pro-peller to the ma chine to be driven, this belt passing within the stack and about a pulley or sprocket wheel 26 keyed upon the shaft adjacent its lower end.

The blades lt are mounted upon the propeller shaft in spaced apart pairs, as shown, each pair being secured to the shaft by means of a blade holder designated as a whole by the numeral 27. This holder may be formed of either wood or metal as desired but is preferably formed of the same material as the propeller shaft. Each of the blade holders comprises a body member formed in a single piece and having a centrally formed bore extending through it at an angle to give it, when mounted upon the shaft, a longitudinal inclination equal to the desired inclination of the propeller blades to the shaft. The ends of this body member are beveled or otherwise formed-to pro vide wedge-shapedblade engaging arms 28 and 29 having axial blade receiving slots 30, the arms being reversely formed to bring the slots of each member at right The propeller shaft is passed through the bores 31 of these blade holders and the holders are bolted or otherwise secured against both longitudinal and rotary. movement upon the shaft. The blades previously designated by the numeral 14iare preferably formed of sheet metal and are secured to the blade holders by passing their inner edge portions into the slots 80 of the holders and securing them therein by bolts, rivets or other preferred means 32.

The blades are so shaped that their inner and outer edges form arcs of concentric circles, while their end edges extend radially to their inner and outer edges. The blades are curved longitudinally from end to end. As previously mentioned, the propeller blades are secured to their shaft in spaced pairs and the; blades of each pair are directed at right angles to each other and extend diametrically from opposite sides of the shaft. lVIoreover, one blade of each pair is inclined downwardly, while the opposite blade is inclined upwardly. The pairsof blades are also peculiarly arranged with respect to each other, for instance, each pair is so arranged that a line drawn centrally through its blades and shaft would extend at right angles to a line similarly drawn through an adjacent pair of blades. Again the pairs of blades are so arranged that the blades of alternate pairs are in alinement with eachother although each of the alined blades is inclined oppositely to the adjacent blades alined therewith.

The peculiar arrangement of blades in oppositely disposed, or oppositely inclined pairs and the arrangement of these pairs in the peculiar manner above described, greatly increases the efficiency of the propeller over the common form of propeller now in use in water motors and the like. Moreover, the specific formation of the blades, when used in a cylindrical casing of the character described, effectively ofiers a relatively large area of contact for the pressure of the fluid passing through the casing and consequently affords great efficiency.

Having thus described the invention, what is claimed as new is:

1. A motor including a rotor shaft, and a plurality of propeller blades secured to said shaft and extending radially therefrom, the inner and outer edges of said blades being arcs of concentric circles of which the end edges are radii, said blades being arcuately curved longitudinally in planes at right angles to the planes of their outer edges by bending them uniformly from end to end.

2. A motor includingavertical rotor shaft, a plurality of propeller blades arranged in oppositely disposed pairs, and means for securing said blades to the shaft, said means including blade holders provided centrally with bores through which the shaft extends, said bores being so formed as to incline the holders at an acute angle to the shaft, the end portions of said holders being beveled to form wedge-shaped blade receiving members which are slotted axially to seat the blades, said Wedge-shaped members being oppositely formed to incline the blades car ried by each holder in reverse direction, the inclination of the blade holders with respect to the shaft positioning one blade of each pair above the other blade and both blades at an angle to the shaft.

In testimony whereof I aflix my signature in presence of two witnesses.

CHARLES K. CHATTERTON. Vitnesses:

CHAS. KooNzE, CHARLES H. FAUsT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, 7 Washington, D. 0. 

